CymR

• Description: pleiotropic regulator of sulfur metabolism
  
  

Gene name	cymR
Synonyms	yrzC
Essential	no
Product	transcription repressor
Function	regulation of sulfur metabolism
Gene expression levels in SubtiExpress: cymR
Interactions involving this protein in SubtInteract: CymR
Metabolic function and regulation of this protein in SubtiPathways: cymR
MW, pI	11 kDa, 9.879
Gene length, protein length	333 bp, 111 aa
Immediate neighbours	yrvO, yrvN
Sequences	Protein DNA DNA_with_flanks
Genetic context This image was kindly provided by SubtiList
Expression at a glance   PubMed

Categories containing this gene/protein

sulfur metabolism, transcription factors and their control, regulators of core metabolism

This gene is a member of the following regulons

stringent response

The gene

Basic information

• Locus tag: BSU27520

Phenotypes of a mutant

• impaired growth in the presence of cystine and increased sensitivity to hydrogen peroxide-, disulfide-, paraquat- and tellurite-induced stresses PubMed
• increased intracellular cysteine pool and hydrogen sulfide formation PubMed
• depletion of branched-chain amino acids PubMed

Database entries

• BsubCyc: BSU27520

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:

• Protein family: Rrf2 family of transcription regulators

• Paralogous protein(s):

Genes repressed by CymR

• ytmI-tcyJ-tcyK-tcyL-tcyM-tcyN-ytmO-ytnI-ytnJ-ribR-ytnL-ytnM PubMed

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s): CysK acts as corepressor PubMed

• Effectors of protein activity:

• Interactions:
  • CymR-CysK, the complex is formed in the presence of cysteine, and results in DNA binding and repression of genes of cysteine biosynthesis PubMed

• Localization: cytoplasm (according to Swiss-Prot)

Database entries

• BsubCyc: BSU27520

• Structure: 2Y75 PubMed

• UniProt: O34527

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon: cymR-yrvO-trmU PubMed

• Expression browser: cymR PubMed

• Sigma factor: SigA PubMed

• Regulation:
  • RelA dependent downregulation (Class I) during stringent response PubMed

• Regulatory mechanism:

• Additional information:
  • number of protein molecules per cell (minimal medium with glucose and ammonium): 508 PubMed
  • number of protein molecules per cell (complex medium with amino acids, without glucose): 1039 PubMed

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

Labs working on this gene/protein

Isabelle Martin-Verstraete, Institute Pasteur, Paris, France